S
M
T
W
T
F
S
26
66°
46°
27
64°
55°
28
77°
50°
29
64°
54°
30
63°
54°
1
66°
48°
2
63°
52°
3
61°
52°
4
57°
48°
5
61°
48°
6
61°
50°
7
63°
46°
8
63°
52°
9
70°
50°
10
64°
52°
11
64°
52°
12
66°
50°
13
61°
50°
14
57°
52°
15
61°
52°
16
62°
54°
17
62°
49°
18
64°
58°
19
69°
56°
20
72°
58°
21
75°
61°
22
74°
56°
23
71°
56°
24
68°
55°
25
69°
54°
26
69°
55°
27
72°
56°
28
64°
50°
29
64°
49°
30
67°
50°
31
69°
52°
1
70°
55°
2
71°
55°
3
69°
54°
4
70°
53°
5
66°
51°
6
64°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Santiago
Santiago's May 2026 forecast shows daily high temperatures ranging from 61° to 75°, with overnight lows between 49° and 61°. The average high for May is 68° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Santiago. See also: June | July | August.
